A term used to define a back-pack that is hiked up on the back of a person
Johnny's tard-bag was hiked up onto his shoulders.
by whodunnit May 09, 2003
A tardbag is a name for a retarded person.
shut up you fucking tardbag.
by Jesse Patrick April 27, 2006
Tard-bag also meaning retardness. Or a bag full of retardness.
That boy is a Tard-bag.
by bosh March 12, 2005